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Case Tractors Discussion Forum

VC cylinder compression

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03-04-2008 10:26:06

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My Case VC (continental engine) has power loss.
Compression is Dry #1 78, #2 68, #3 90, #4 88 Wet #1 92, #2 90, #3 105, #4 98
Any suggeastions?
I was prepared to re-build engine, till I ran across notes from 2003. Compressions were very similiar and tractor ran ok. Use it to rake hay.

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57 600

03-05-2008 08:52:52

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 Re: VC cylinder compression in reply to whitedvm, 03-04-2008 10:26:06  
Is the governor working properly? They were known to be a bit of a problem on the VC. Does it have a mag or distributor ignition? Carburetor in good shape? Assuming clean dry gas and clean air filter.

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03-05-2008 13:59:25

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 Re: VC cylinder compression in reply to 57 600, 03-05-2008 08:52:52  
It has been converted to 12 v. Has ignition coil, but still uses gutted out magneto for distributing spark. Would I be better off putting a distributor on it? I will look at the governor. Other than surging, what else should I be checking on the governor?

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57 600

03-05-2008 19:52:46

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 Re: VC cylinder compression in reply to whitedvm, 03-05-2008 13:59:25  
Make sure all of the linkage and joints are free and that the governor spring is tensioned correctly. With the motor shut off make sure that when the throttle lever is opened that the throttle shaft in the carb actually turns completely open. When the Motor is running and a load pulls the RPM's down see if the throttle plate opens up the whole way.(This is much easier with a Dynomometer or other load on the PTO.) If the balls in the governor have worn a groove in the cone, from running at a constant load a lot, it can be slow to respond.

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